Basic Info.
Model NO.
W-Flanges
Structure
Round
Connection
Welding
Sealing Surface
RF
Manufacturing Way
Forging
Certificates
ISO9001-2015, CE
Flange Types
Pl, So,Bl, Wn, Sw, Lap Joint
Flange Face
FF,RF,Rtj, Lap Joint, Tongue and Groove, M, F
Pressure
Pn2.5 to Pn160
Transport Package
Protect Cap, PP Bag & Plywood Cases
Specification
DN8(1/4") to DN1000(40")
Trademark
WELFLOW
Origin
China
HS Code
7307210000
Production Capacity
50000piece/Month
Product Description
Stainless Steel Forged Flanges ANSI, BS, JIS, EN, DIN Standard
FOR FLANGE TYPES
PLATE FLANGE(PL)
This type is a flat, circular disk that is welded onto the end of a pipe and connects to another flange or fitting. Unlike more complex flanges, it doesn't have a raised face or a lip for a gasket. Plate flanges are generally used in less demanding applications where ease of assembly and cost are more important than high pressure and temperature resistance.SLIP-ON FLANGES(SO)
SO type are designed to slide over the end of a pipe and are then welded in place. They are easier and more economical to install compared to more robust types like weld neck flanges. Typically used in lower-pressure applications, slip-on flanges are popular in industries like water treatment and petrochemicals. They offer a convenient but less durable alternative for connecting pipes in a system.
BLIND FLANGES(BL)
BL type is used to seal off a section of pipe or a nozzle on a vessel that is not in use. Unlike other flanges that are used to connect pipes, a blind flange is flat and does not have a bore or hole in the center. This design effectively blocks off the flow of fluid through a pipeline, allowing for maintenance, inspection, or system modifications.WELD NECK FLANGES(WN)
WN type is a type of flange that is designed to be joined to a piping system by butt welding. Unlike other flanges that can be attached to the pipe in various ways, a weld neck flange has a long tapered hub that goes over the end of the pipe. This tapered hub provides an ideal welding area and offers a tight, high-integrity seal that prevents leaks and ensures durability under high stress.
SOCKET WELD FLANGES(SW)
SW type are used in applications requiring a strong but easily disassemblable connection. These flanges feature a socket into which the pipe is inserted and then fillet-welded to secure it in place. The design allows for a smooth bore and better fluid or gas flow inside the piping system. Socket weld flanges are often used in small-diameter, high-pressure applications such as hydraulic and steam lines.LOOSE FLANGE(LAP JOINT FLANGE)
A Loose Flange, also known as a Lap Joint Flange, consists of a stub end welded to the pipe and a backing flange that slides over it. This design allows for easy maintenance and is often used in low-pressure applications where bolt-hole alignment or frequent system access is required. The flanges can be made from materials like carbon steel or stainless steel, depending on the application.
| QUESTION? | ANSWER |
| 1. Are you a factory? | Yes, Welflow is a factory located in Wenzhou, Zhejiang, China. |
| 2. Do you have any MOQ requirements? | It is not limited to MOQ but includes the difference in unit price. |
| 3. Payment Terms | Typically, 30% T/T is used as a deposit, and 70% against a copy of BL/ Or balance L/C at sight. |
| 4. Nearly Sea Port | Ningbo or Shanghai Port |
| 5. Terms: | FOB Ningbo/Shanghai, CIF, FCA, etc. |
| 6. Delivery Time: | Typically, it is 30-35 days after receiving the deposit payment. However, almost all of the items we have stock in 304. |
| 8. Could you accept marking our logo on the products? | Yes, air pump typing or laser marking is okay. |
| 9. Do you have Material Certificates? | If required, Each item will be laser marked with Heat NO and the material certificates. |
| 10. How do you deal with customer complaints, such as quality issues? | This is an issue we take very seriously. As long as it is confirmed to be a quality issue, we will take full responsibility. 1. exchange or refund is acceptable. It mainly depends on how you need to deal with it. |
FOR FLANGE FACES
FLAT FACE: A flat surface without elevation is used mainly for low-pressure and non-critical applications.
RAISED FACE: Features a raised area around the bore, common in many high-pressure applications and allows for a variety of gasket types.
RING-TYPE JOINT (RTJ): Features a grooved face that holds a metal ring gasket, used in high-pressure and high-temperature applications.
LAP JOINT: Often used with a matching stub end, this face allows for easy alignment and is used primarily in systems that require frequent maintenance.
TONGUE AND GROOVE: One flange has a raised ring (tongue), and the other has a depressed ring (groove); they fit into each other to form a tight seal.
MALE AND FEMALE: Similar to tongue and groove but more exaggerated; the male flange has an additional lip, and the female flange has a corresponding recess.